It’s a left side 8’5 right????
Multiply equation A by -5.
Once this is done you can add equation A to equation B and see that we are adding -5z to 5z, resulting in the value 0.
Answer:5
That is exactly correct! Just two things: First, tan,sin,cos, etc hold no meaning on their own, they need an argument. So just be sure to write tanx, cosx etc rather than just tan or cos.
Finally, you could save time on your proof by noticing on the fourth step that
1cosxsinx=1cosx1sinx=secxcscx
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Hard to explain but i need to make this 20 characters long so hi