Question

prove that sin90= 1​

Answer 1

Answer:

sin 90 =1

as sin 30=1/2

and sin 60 =✓3/2

if sin 90= sin (30+60)

then sin 90=sin30+sin60

so 1/2+✓3/2

1+✓3/2

if squaring both side then

sin ²90=1/4+3/4

then

sin ²90=4/4=1

sin 90 also equals to 1

hopes helps you dear mate

Answer 2

soln refers to the attachment