Question

Evaluate the following:
(i) (sin49°/cos41°)²+(cos41°/sin49°)²
(ii) cos48°-sin42°
(iii) cot40°/tan50°-1/2(cos35°/sin55°)
(iv) (sin27°/cos63°)²-(cos63°/sin27°)²
(v) tan35°/cot55°+cot78°/tan12°-1
(vi) sec70°/cosec20°+sin59°/cos31°
(vii) cosec 31° - sec 59°
(viii) (sin72°+cos18°)(sin72°-cos18°)
(ix) sin35°sin55v-cos35°cos55°
(x) tan48°tan23°tan42°tan67°
(xi) sec50°sin40°+cos40°cosec50°

Answer 1

Answer:

I will answer for 2 questions so don't be mad at me.

1.sin49=sin(90-41)=cos41

cos41=cos(90-49)=sin49

from question

1+1=2

2.cos48=cos(90-42)=sin42

from question

answer is 0.

3.cot40=cot(90-50)=tan50

cos35=sin55

from question

1-1/2=1/2

do the other sums in the same way