Question

cos 70/sin 20 + cos59. cosec31,Evaluate it.

Answer 1

Cos 70 ÷ sin 20
These are complementary angles
Therefore
Cos 70÷ cos 70 =1 - A

Cos59 × cosec 31
Cos59 × sec 59
Cos 59× 1/ sec 59=1- B

A + B
1+ 1
=2

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Answer 2

Answer:

answer is this

Step-by-step explanation:

1. =cos70°/sin(90°-70°) +co59°×cosec(90°-59°)
2. =cos70°/cos70°+cos59°×sec59°
3. =1+1
4. =2