Question

if sin A =1/root 5, cos B = 3/root 10 where A and B are positive acute angles , prove that A+B=45.

Answer 1

Step-by-step explanation:

sinA=1√5,cosA=√1-sin^2A

cosA=2/√5,tanA=sinA/cosA=1/√5/2/√5

tanA=1/2

cosB=3/√10,sinB=1/√10

tanB=1/3

tan(A+B) =tanA+tanB/1-tanA×tanB

tan(A+B) =1/2+1/3÷1-1/2×1/3

tan(A+B) =3+2/6÷1-1/6

tan(A+B) =5/6÷6-1/6

tan(A+B) =5/6÷5/6

tan(A+B)=1

tan(A+B)=tan45°

(A+B)=1

Answer 2

Step-by-step explanation:

app unblock to karo aur han jo appko time pass lagta hai wo mere liye time pass nahi hai wo time bhut keemti tha app khud hi sovho kisi ko aadness ho uper se jiske uper wo trust karta hai wo bhi usse naraj ho jai to wo bechara kya karega mujhe to bas app aur appki hapiness chahiye thi aur han ab koi nahi rahega last time baat karke sabko block kar dunga aur phir kabhi kisi ko inbox nahi karunga pass bhi change nahi kafjbga kabhi