15(sin^2 69' - cos^2 69')/cos138'. Created by дилядильдора. algebra-ru

cos138'...

дилядильдора @дилядильдора

July 2022 1 16 Report

15(sin^2 69' - cos^2 69')/cos138'

Answers & Comments

NNNLLL54

Verified answer

$cos^2 \alpha -sin^2 \alpha =cos2 \alpha \; \; ;\; \; \; \; \alpha =69^\circ \; ,\; 2 \alpha =138\\\\ \frac{15(sin^269^\circ -cos^269^\circ)}{cos138^\circ }= \frac{15\cdot (-cos138^\circ)}{cos138^\circ} =-15$

6 votes Thanks 13

рекомендуемые вопросы

rarrrrrrrr August 2022 | 0 Ответы

o chem dolzhny pozabotitsya v pervuyu ochered vzroslye pri organizacionnom vyvoze n

danilarsentev August 2022 | 0 Ответы

est dva stanka na kotoryh vypuskayut odinakovye zapchasti odin proizvodit a zapcha

myachina8 August 2022 | 0 Ответы

najti po grafiku otnoshenie v3v1 v otvetah napisano 9 no nuzhno reshenie

ydpmn7cn6w August 2022 | 0 Ответы

Choose the correct preposition: 1.I am fond (out,of,from) literature. 2.where ar...

millermilena658 August 2022 | 0 Ответы

opredelite kak sozdavalas i kto sozdaval arabskoe gosudarstvo v kracii

MrZooM222 August 2022 | 0 Ответы

ch ajtmanov v rasskaze krasnoe yabloko ispolzuet metod rasskaz v rasskaze opi

timobila47 August 2022 | 0 Ответы

kakovo bylo naznachenie kazhdoj iz chastej vizantijskogo hrama pomogite pozhalujsta

ivanyyaremkiv August 2022 | 0 Ответы

moment. 6....

pozhalujsta8b98a56c0152a07b8f4cbcd89aa2f01e 97513

sarvinozwakirjanova August 2022 | 0 Ответы

pomogite pozhalusto pzha519d7eb8246a08ab0df06cc59e9dedb 6631

Answers & Comments

Verified answer

рекомендуемые вопросы

Helpful Links

Helpful Social