Math, asked by Pushbita, 1 year ago

Express cos 78+ tan 78 in terms of angels between 0 to 45

Answers

Answered by anugusrilekha

2

Cos(78)=cos(90-12)=sin(12)
Tan(78)=tan(90-12)=-cot(12)
Cos78+tan78=sin12-cot12

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