Ответ:
log_1/√2*(cos²22,5°-sin²22,5°)=log_1/√2cos(2*22,5°)=log_1/√2cos45°=log_1/√2 1/√2=1.
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Ответ:
log_1/√2*(cos²22,5°-sin²22,5°)=log_1/√2cos(2*22,5°)=log_1/√2cos45°=log_1/√2 1/√2=1.